gummiboot software package provides Simple UEFI bootloader, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gummiboot
gummiboot is installed in your system.
Make ensure the gummiboot package were installed using the commands given below,
$ sudo dpkg-query -l | grep gummiboot *
You will get with gummiboot package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | gummiboot |
| Version | 45-2 |
| Description | Simple UEFI bootloader |
| Sub Section | admin |